Implement ScreenOrientationProvider for Chrome Android.

content/browser/screen_orientation/screen_orientation_provider.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_SCREEN_ORIENTATION_PROVIDER_H_
 #define CONTENT_BROWSER_SCREEN_ORIENTATION_PROVIDER_H_
 
+#include "third_party/WebKit/public/platform/WebScreenOrientation.h"
+
 namespace content {
 
 // Interface that needs to be implemented by any backend that wants to handle
 // screen orientation lock/unlock.
 class ScreenOrientationProvider {
  public:
   // Lock the screen orientation to |orientations|.
   virtual void LockOrientation(blink::WebScreenOrientations orientations) = 0;
 
   // Unlock the screen orientation.
   virtual void UnlockOrientation() = 0;
 
   virtual ~ScreenOrientationProvider() {}
 };
 
 } // namespace content
 
 #endif // CONTENT_BROWSER_SCREEN_ORIENTATION_PROVIDER_H_